Is it worth it to get a Hokkaido Rail Pass?

Hi all! I will be travelling in Hokkaido this June and I need some help in deciding if it is worth it to get a Hokkaido Rail pass, or if I should just buy individual tickets. Here are all my trips to be taken:

1) Chitose Airport to Sapporo (one way)2) Sapporo to Asahikawa (one way)3) Asahikawa to Sapporo (one way-to be taken on a separate day as no.2)4) Sapporo to Otaru (both ways- one day trip)5) Sapporo to Chitose Airport

The trips above will all be taken on a separate day, and I will be driving around Asahikawa-Furano- Biei area (which sits in the middle of my trip) so I don't know if it is worth it to get the 4 days flexible pass or is it worth it to get the pass at all. Please help!